Medium severity · published Aug 19, 2026
CVE-2026-61690
Grav: Decompression Bomb via ZipArchiver - Missing Extraction Limits
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
Grav is a file-based Web platform. Prior to 2.0.1, Grav ZipArchiver::extract() in system/src/Grav/Common/Filesystem/ZipArchiver.php passes archives to ZipArchive::extractTo() without enforcing the system.gpm.archive uncompressed-size, file-count, or nesting-depth limits. Code using Archiver::create('zip') to extract an attacker-controlled archive can exhaust disk space or inodes and make the site unavailable. This issue is fixed in version 2.0.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
< 2.0.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-61690
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-61690
github.com
https://github.com/getgrav/grav/commit/1c1003cfcab5344203d6fde1aaa1f9a4ee3413ff
github.com
https://github.com/getgrav/grav/releases/tag/2.0.1
github.com
https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56
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